2. Strike Industries AR-15 Ultimate Dust Cover. Polymer ejection port cover simply snaps into place and eliminates the need to use a c-clip or rod. Adjustable detent set screw allows user to increase or decrease opening power. Available in plain black or with black American flag pattern molded into the surface.

4. Radical Firearms AR-15 Upper Assemblies. AR-15 uppers come complete except for charging handle and bolt carrier assembly, and are available in different calibers and barrel lengths. Uppers are flat top for simple optics and accessories mounting, and have free-float handguard and low-profile gas block to help maximize accuracy potential. Forward assist and ejection port cover are both installed, and handguard has multiple mounting points for QD sling sockets.

Serious About Firearms Since 1939™, Brownells is the world’s leading source for gun parts and accessories, ammunition, gunsmithing tools and survival gear. With a large selection of both common and hard-to-find items, and an extensive collection of videos, articles, and gun schematics, Brownells is the expert for everything shooting-related. Committed to maintaining our great traditions, Brownells has more, does more and knows more – and guarantees it all, Forever. For more information or to place an order, call 800-741-0015 or visit Brownells.com. Stay up-to-date with Brownells on YouTube, Facebook, Twitter and Instagram.